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Showing 1 to 12 of 78 entries
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On the stabilization of carbanions by adjacent phenyl, cyano, methoxy-carbonyl, and nitro groups in the gas phase.

Journal of the American Society for Mass Spectrometry

Peerboom RA, de Koning LJ, Nibbering NM.
PMID: 24222545
J Am Soc Mass Spectrom. 1994 Mar;5(3):159-68. doi: 10.1016/1044-0305(94)85029-1.

Institute of Mass Spectrometry, University of Amsterdam, Amsterdam, The Netherlands By using the method of Fourier transform ion cyclotron resonance mass spectrometry, substituent stabilization energies of homologous series of cycloalkyl carbanions, Ξ-c-CnH2n-2 (n = 3, 4, 5, 6, 7)...

Insertion reactions of metal carbonyl anions with methyl formate in the gas phase as revealed by (13)C- and D-labeling.

Journal of the American Society for Mass Spectrometry

van den Berg KJ, Ingemann S, Nibbering NM, Gregor IK.
PMID: 24222620
J Am Soc Mass Spectrom. 1994 Jun;5(6):525-36. doi: 10.1016/1044-0305(94)90001-9.

School of Chemistry, University of New South Wales, Kensington, Australia Institute of Mass Spectrometry, University of Amsterdam, Nieuwe Achtergracht The gas-phase reactions of coordinatively unsaturated metal carbonyl anions (M(CO) n (-) , M=Cr, Mn, Fe, Co; n=0-3 and Co(CO)nNO(-),...

Correction: Detection of Alpha-Toxin and Other Virulence Factors in Biofilms of Staphylococcus aureus on Polystyrene and a Human Epidermal Model.

PloS one

den Reijer PM, Haisma EM, Lemmens-den Toom NA, Willemse J, Koning RI, Demmers JA, Dekkers DH, Rijkers E, El Ghalbzouri A, Nibbering PH, van Wamel W.
PMID: 27010549
PLoS One. 2016 Mar 24;11(3):e0152544. doi: 10.1371/journal.pone.0152544. eCollection 2016.

No abstract available.

Gas-phase reactions between O(-.) and C 6H 5F: On the acidity of fluorobenzene and 1,4-difluorobenzene.

Journal of the American Society for Mass Spectrometry

Matimba HE, Ingemann S, Nibbering NM.
PMID: 24234747
J Am Soc Mass Spectrom. 1993 Jan;4(1):73-81. doi: 10.1016/1044-0305(93)85045-Y.

The gas-phase reactions of negative ions (O(-.), NH 2 (-) , C2H5NH(-), (CH3)2N(-), C6H 5 (t-) , and CH3SCH 2 (-) ) with fluorobenzene and 1,4-difluorobenzene have been studied with Fourier transform ion cyclotron resonance mass spectrometry. The O(-.)...

The role of distonic ions in the formation of CH3NH 3 (+) and (CH 3) 2NH 2 (+) from the molecular ions of octopamine and synephrine.

Journal of the American Society for Mass Spectrometry

Cardoso AM, Ferrer-Correia AJ, Fokkens RH, Nibbering NM.
PMID: 24248617
J Am Soc Mass Spectrom. 1990 Feb;1(1):104-6. doi: 10.1016/1044-0305(90)80012-C.

It is shown by mass-analyzed ion kinetic energy spectrometry that the metastably decomposing molecular ions of octopamine (p-HOC6H4CH(OH)CH2NH2) and synephrine (p-HOC6H4CH(OH)CH2NHCH3) yield only protonated methylamine and dimethylamine, respectively, as product ions. From deuterium labeling and variation of the internal...

A study of light-induced proton transfer from gas phase (radical) cations to reference bases. Bracketing of proton transfer from excited ions and associated reaction kinetics.

Journal of the American Society for Mass Spectrometry

van Amerom EH, van Duijn D, van der Hart WJ, Nibbering NM.
PMID: 11322182
J Am Soc Mass Spectrom. 2001 Apr;12(4):359-66. doi: 10.1016/s1044-0305(01)00216-1.

By use of Fourier transform ion cyclotron resonance, it is shown that protonated naphthalene when excited with laser light of 488 nm is more reactive in proton transfer to reference bases than in its ground state. The excitation leads...

The role of large conformational changes in efficient ultrafast internal conversion: deviations from the energy gap law.

Journal of the American Chemical Society

Fidder H, Rini M, Nibbering ET.
PMID: 15038732
J Am Chem Soc. 2004 Mar 31;126(12):3789-94. doi: 10.1021/ja038741y.

Conversion of electronic excitation energy into vibrational energy was investigated for photochromic spiropyran molecules, using femtosecond UV-mid-IR pump-probe spectroscopy. We observe a weaker energy gap dependence than demanded by the "energy gap law". We demonstrate that large conformational changes...

Anomalous long-range propagation of femtosecond laser pulses through air: moving focus or pulse self-guiding?.

Optics letters

Lange HR, Grillon G, Ripoche JF, Franco MA, Lamouroux B, Prade BS, Mysyrowicz A, Nibbering ET, Chiron A.
PMID: 18084432
Opt Lett. 1998 Jan 15;23(2):120-2. doi: 10.1364/ol.23.000120.

Self-guided propagation of femtosecond laser pulses is studied for a converging-beam configuration. Channeling of the pulse energy through various gases is observed over distances well beyond the lens focal point, a fact that cannot be explained by the moving-focus...

Ultrafast structural dynamics of water induced by dissipation of vibrational energy.

The journal of physical chemistry. A

Ashihara S, Huse N, Espagne A, Nibbering ET, Elsaesser T.
PMID: 17266211
J Phys Chem A. 2007 Feb 08;111(5):743-6. doi: 10.1021/jp0676538.

In the liquid phase, water molecules form a disordered fluctuating network of intermolecular hydrogen bonds. Using both inter- and intramolecular vibrations as structural probes in ultrafast infrared spectroscopy, we demonstrate a two-stage structural response of this network to energy...

Cryo-electron tomography analysis of membrane vesicles from Acinetobacter baumannii ATCC19606 T.

Research in microbiology

Koning RI, de Breij A, Oostergetel GT, Nibbering PH, Koster AJ, Dijkshoorn L.
PMID: 23517882
Res Microbiol. 2013 Jun;164(5):397-405. doi: 10.1016/j.resmic.2013.02.007. Epub 2013 Mar 19.

Acinetobacter baumannii is an important nosocomial pathogen responsible for colonization and infection of critically ill patients. Its virulence attributes together with the condition of the host determine the pathogenicity of A. baumannii. These virulence factors may be delivered to...

Non-contact induction heating and SAAP-148 eliminate persisters within MRSA biofilms mimicking a metal implant infection.

European cells & materials

Verheul M, Drijfhout JW, Pijls BG, Nibbering PH.
PMID: 34260058
Eur Cell Mater. 2021 Jul 14;43:34-42. doi: 10.22203/eCM.v042a03.

Implant-associated infections are the primary cause of complications following orthopaedic surgery. Due to biofilm and persister formation, current treatments, i.e. surgical debridement followed by antibiotics, often fail. There is an urgent need for alternative strategies to combat such infections....

Combined Experimental and Theoretical Study of the Transient IR Spectroscopy of 7-Hydroxyquinoline in the First Electronically Excited Singlet State.

The journal of physical chemistry. A

Hoffmann F, Ekimova M, Bekçioğlu-Neff G, Nibbering ET, Sebastiani D.
PMID: 27934323
J Phys Chem A. 2016 Dec 01;120(47):9378-9389. doi: 10.1021/acs.jpca.6b07843. Epub 2016 Nov 18.

The photophysics of 7-hydroxyquinoline (7HQ) in protic media results from an interplay of acid-base chemistry, prompted by the effects of photoacidity of the hydroxyl group and photobasicity of the nitrogen atom in the quinoline aromatic system. With ultrafast IR...

Showing 1 to 12 of 78 entries